1. PC is slow but CPU/RAM normal — what next?
Because CPU/RAM are fine, the issue is likely elsewhere:
- High Disk Usage (100%) → caused by Windows Update, Search Indexing, Malware.
- Startup Programs → Delay boot/login.
- Malware → Runs silently.
- Hard Drive Health Issues → Bad sectors make the system slow.
- Network Delays (Roaming Profile) → Especially in corporate environments.
2. PC won’t join domain — what to check?
Domain join requires proper network and DNS.
- Ensure PC has correct DNS (AD DNS).
- Ping Domain Controller.
- Check time sync (Kerberos fails if >5 mins difference).
- Check if computer object already exists → delete stale entry.
- Verify user permissions to join the domain.
3. Correct password but cannot log in — why?
Possible reasons:
- Account locked or disabled.
- Password expired.
- PC is in workgroup instead of domain.
- Keyboard layout wrong (US/UK).
- Corrupt profile causing login loop.
4. LAN connected but no Internet — reason?
If LAN icon is fine but Internet fails:
- DNS not working (most common).
- Incorrect proxy settings.
- DHCP gave wrong gateway.
- Firewall blocking outbound traffic.
5. Outlook not opening — what to do?
Common Outlook corruptions:
- Use Outlook /safe to start without add-ins.
- Repair profile (Control Panel → Mail).
- Rebuild OST (delete OST).
- Disable problematic add-ins.
- Check mailbox size if over quota.
6. “Preparing Automatic Repair” loop — solutions?
This indicates OS boot issues:
- Boot to Safe Mode.
- Run SFC and DISM.
- Run chkdsk for disk errors.
- Use System Restore.
If all fails → in-place OS repair.
7. Dual monitor not detected — why?
Most common reasons:
- Faulty HDMI/DP cable.
- Wrong display mode → press Win + P.
- Incorrect resolution.
- Display driver corrupted.
8. Shared printer not printing — fix?
Common root causes:
- Print Spooler stuck → restart “Print Spooler”.
- Queue stuck → clear print queue.
- Printer offline.
- Network unreachable.
- Permission issues for shared printers.
9. Printer prints garbage characters — reason?
- Incorrect printer driver.
- Corrupted print job.
Fix: reinstall correct model driver.
10. Cannot access shared folder — why?
- NTFS permission mismatch.
- AD group membership not applied.
- Wrong folder path.
- SMB blocked in firewall.
11. BSOD 0x0000007B — what it means?
“Inaccessible Boot Device” →
- Hard drive failure.
- Bootloader corruption.
- SATA mode changed (AHCI ↔ IDE).
12. Windows Update fails to boot — fix?
- Boot into recovery.
- Uninstall last update.
- Run Startup Repair.
- Run SFC/DISM.
- Restore system.
13. Frequent Wi-Fi disconnections — causes?
- Weak signal.
- Wi-Fi interference (microwave, 2.4GHz crowding).
- Driver issues.
- DHCP lease conflicts.
- Router power-saving enabled.
14. User audio not working — check?
- Wrong playback device selected.
- Muted audio.
- Corrupted audio driver.
- Audio service stopped.
15. USB devices not detected — why?
- USB ports disabled in BIOS.
- Chipset drivers missing.
- Physical damage.
- Power surge disabled USB temporarily.
16. Desktop icons disappear — reason?
- Explorer.exe crashed.
- Auto-arrange enabled.
- Corrupt user profile.
17. RDP connection failing — check?
- PC pingable?
- RDP enabled?
- Firewall port 3389 open?
- User added to “Remote Desktop Users”?
- IP conflict?
18. VPN connected but no access — why?
- Wrong routing table.
- DNS split tunneling misconfigured.
- Missing access permissions.
- Gateway not assigned.
19. PC overheating — causes?
- Dust buildup.
- Fan failure.
- Driver causing high CPU.
- Poor ventilation.
20. System clock resets — reason?
CMOS battery is dead → replace coin-cell battery.
21. Windows Update stuck — solution?
- Restart Update service.
- Delete SoftwareDistribution folder.
- Reset Windows Update components.
22. Corrupt profile error — what to do?
- Backup user data.
- Delete old profile folder.
- Log in to create new profile.
- Restore data.
23. IP conflict — why?
- Two devices same static IP.
- DHCP giving duplicate leases.
Solution: release/renew IP + fix static conflicts.
24. DNS not resolving — fix?
- Flush DNS cache.
- Restart DNS Client service.
- Verify DNS IP address.
- nslookup test.
25. Laptop battery drains fast — check?
- Background apps heavy.
- High brightness.
- Battery health deteriorated.
- Wrong power plan.
26. Deleted file recovery — options?
- Recycle Bin.
- Previous Versions (Shadow Copy).
- Server backups (Veeam/Acronis/etc.).
27. Slow login after credentials — why?
- Roaming profile large.
- GPO scripts heavy.
- Network slowness.
- Logon interactively disabled.
28. Keyboard typing wrong characters — reason?
- Wrong layout (US/UK).
- Num lock active (laptops).
- Language switched accidentally.
29. Windows activation fails — why?
- KMS server not reachable.
- DNS SRV entries missing.
- Wrong product key.
30. Laptop camera not detected — why?
- Privacy settings blocking camera.
- Camera disabled in Device Manager or BIOS.
- Driver corrupted.
31. Random shutdowns — reason?
- PSU failure.
- Overheating.
- Faulty RAM.
- Motherboard issues.
32. Application won’t launch — steps?
- Corrupt installation.
- Missing dependencies (.NET, C++ Redis).
- Permissions issue.
- Antivirus blocking it.
33. User lost BitLocker key — what to do?
- Retrieve from Azure AD.
- Retrieve from Active Directory.
- Retrieve from Microsoft Account (personal PCs).
34. Slow file server access — why?
- Network bandwidth issue.
- Faulty cable/port.
- SMB signing overhead.
- Server load.
35. Folder redirection not working — fix?
- Incorrect GPO.
- NTFS permissions wrong.
- Offline files conflict.
- Wrong UNC path.
36. GPO not applying — reason?
- AD replication delay.
- PC not in correct OU.
- GPO security filtering failing.
- WMI filter mismatch.
37. Long login times — reason?
Same as Q27 + DNS slowness:
- Slow DNS → delays authentication.
- Login scripts running slowly.
38. Hard drive not detected — reason?
- SATA cable loose.
- Disk failure.
- BIOS SATA mode wrong.
39. Limited Connectivity — cause?
- Missing gateway.
- DHCP not working.
- DNS unreachable.
40. Cannot connect to shared printer — fix?
- Install correct driver.
- Printer offline.
- Permissions missing.
41. Software installation fails even with admin — why?
- UAC blocking.
- Corrupt installer.
- Required services disabled (Windows Installer).
- Antivirus blocking.
42. Frequent pop-ups — cause?
- Malware infection.
- Adware extensions in browser.
- Suspicious startup programs.
43. Disk usage 100% — why?
- Superfetch causing load.
- Search indexing.
- HDD failing (SMART errors).
44. HDMI “No Signal” — fix?
- Wrong input mode selected.
- Faulty cable.
- Driver corruption.
- GPU disabled.
45. Laptop not charging — reason?
- Adapter faulty.
- Charging port damaged.
- Battery health 0%.
- BIOS power configuration wrong.
46. VPN authentication fails — reason?
- Expired password.
- Certificate expired.
- RADIUS server down.
47. Teams cannot sign in — why?
- Incorrect system time.
- Teams cache corruption.
- Corporate conditional access settings.
48. Wi-Fi slow but connected — check?
- Wi-Fi interference.
- Outdated driver.
- Router bandwidth issue.
- Too many devices on same network.
49. Disk errors in Event Viewer — what next?
- Backup immediately.
- Run chkdsk.
- Replace failing HDD/SSD.
50. PC freezes randomly — reason?
- Faulty RAM.
- GPU overheating.
- Disk failure.
- Corrupted drivers.
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