Blank device manager

Boot into Safe Mode, go into Services.msc and stop PnP and then reboot into normal mode. Return to Services.msc and restart PnP. Check Device Manager. If still blank, reboot and try it again. Hope this works for you.

If the above doesn't work, suspect spyware. These can break parts of the OS (like spyware and virus scanners), so take the HD and scan it on a clean computer which is up-to-date for all OS, spyware, virus scanners.

snipped from support.microsoft.com (in support of what ct sais...)
1. Click Start, click Run, type services.msc, and then click OK.
2. Double-click Plug and Play.

If you receive a Configuration Manager message, click OK.
3. In the Startup Type list, click Automatic, and then click OK.
4. Close Services.
5. Restart the computer.

We are experiencing same issue. We agree that it may be a virus/spyware but have been unable to detect it with updated virus/spyware programs such as Norton's.

open control panel and double click on add/remove programs/software. Look for a program named contextplus and click on it and then change remove(uninstall) and reboot. Check device manager and make sure your devices are listed.

The contextplus fix just worked for me. Thanks, pugman2.

I have also experienced the 'Blank Device Manager' problem and the information on this page helped resolve the problem. I had the 'contextplus' spyware problem and removed it. Thank you.

dear all go to run>regedit>hkey local maachine>system>enum>rigt click permisson>everyone and system select
everyone give only read and system give read and full permisson
then reboot ur pc may be solved problem if till same problem then take below steps
run>services.msc>plu and play>enable>reboot