Windows 7 - No Files or Folders to be Found

Thanks for the feedback, everyone. I guess the best thing for me to do is re-install Windows? I have the CD, but I wouldn't know where to begin, so help with this next step would be much appreciated!

Also, I have my essential files already backed up, I'm assuming re-installing Windows would wipe all the files off my harddrive?

Pete

Read this tutorial : Installing or re-installing Windows 7
Installing and reinstalling Windows 7

Click " use the Upgrade installation option " link and follow the instructions.

Hi, I had the same problem and this thread helped me so much! But I have some questions what I should do next. I installed Malwarebytes yesterday and it found 1 infection but it didn't finish scanning (my family didn't know its running so they accidentaly turned laptop off) but when i was home, Microsoft Security Essentials (while Malwarebytes was scanning) also found 2 infections (but i didnt start the scan) and deleted those 2. It found Trojan:Win32/FakeSysdef and Exploit:Java/CVE-2011-3544.R

Today I started Malwarebytes scanning again and it found nothing.

Malwarebytes Anti-Malware (Trial) 1.60.1.1000
Malwarebytes : Free anti-malware, anti-virus and spyware removal download

Database version: v2012.02.05.01

Windows Vista Service Pack 1 x86 NTFS
Internet Explorer 8.0.6001.19019
Dajchy :: CHOCOLATE-PC [administrator]

Protection: Enabled

5.2.2012 9:44:42
mbam-log-2012-02-05 (09-44-42).txt

Scan type: Full scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 313439
Time elapsed: 1 hour(s), 54 minute(s), 17 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)

So my question is, did the program delete that infection which was found yesterday even though the scan wasnt complete?
And I checked the 'Show hidden files' today and all the things are visible now.
Is that virus/rootkit or whatever now gone for good?
Or it will make me some more problems?

Chances are your computer is clean now.

If you want to be absolutely certain. let Malwarebytes run another full scan, but make sure you're on hand to ensure no-one turns your computer off while the scan is running.

Being safe is good. Malwarebytes Anti Malware is a great program. No program does it all and that is why many of us run many things for protection. Here is a free program from Microsoft that you can also run. It will take time, so make sure your computer stays on but not used.
Microsoft Safety Scanner - Antivirus | Remove Spyware, Malware, Viruses Free

I removed MSE and installed avast. Avast found 5 more infections and deleted it, one of them was a part of Malwarebytes (it found Trojan-gen in setup which i downloaded) so i removed it too. I guess its clean now, but im considering to maybe install spybot search&destroy because i had it years ago on my old computer. I really had a busy day today with all those things, I even run Tune up utiliteis and it also fixed some issues.
I'm staying with avast now, but i was really surprised when it found Trojan in Malwarebytes setup...
Should i do something more to be 100% shure? i really dont want to experiment more because i'm not really an expert....btw my laptop was on servis 2 days ago (because all folders were empty) and the guy convinced me that theres nothing wrong with it. well i really see that he was "right", if 5 infections (7 if i count yesterdays) is NOTHING.