I'm struggling to actually find a reason as to why this has happened on a laptop with the relevant protection and never had its registry/drivers played around with.
DVD Drive appears as Hard Drive, Video Drivers missing, Error 31 on network wan miniports, Cant install any network devices.
System restore also isn't possible as system protection is turned off.
Devcon.exe always fails to install the wan miniport drivers and device manager still does not allow the manual installation of them.
Network driver does not allow install (parameter is incorrect).
Nothing obvious in event viewer.
SFC reports no errors, Chkdsk reported some bitmap error, fixed it but still not working.
One more thing I noticed was when you open device manager, on the first line, the computer name should appear, instead its blank.
This laptop has Kaspersky Pure 3.0 installed and is malware free (had a malwarebytes scan about a few weeks ago).
I will perform a hard drive test soon. Does anyone know the possible reason as to why this may have happened; the best I can find is a failed windows update KB2862330
Acer Laptop - Win 7 Home premium x64
More about :drive appears hard drive video drivers missing error network wan miniports install network devices
I'll do a Hard Drive test now and I'll also try run CCleaners registry cleanup and then use memtest. I wouldn't give this laptop back as completed without reinstalling the OS especially in the state its currently in. Thanks i'll let you know how it goes. Btw OS repair is a bit of a grey area, its a factory OEM install with sp1 already installed.
Sounds like something got corrupted. Either the HDD starting to fail, or a failed update, or a ram glitch, or power loss at the wrong time.
I would still start with a few full scans on the malware and antivirus side of things to be sure (in safe mode). Certainly get your files off of that drive to be safe as well.
After that then do a Ram test and HDD test. Use a good registry cleaner to try and set things right (this seems to be where the problems are) like the one bundled with CCleaner.
If all of that fails to bring anything up then it is time to look at repairing the OS (you have a copy of win7 laying around right?), or doing a full reinstall.