malware not cutting it

I have just some basic malware removal and adware, antivirus the normal stuff. Im not a techy or anything i just know some basic things and can dig a little deeper if i had to. but my roomate downloaded somthing into my shared folder and i cant access the folder now. this includes all scans that try to see the folder any time i click on it and my download software that save to it. I cant even open the software to change its destionation. The is no way to delete it and i cant find a back door. everytie i try to use it i get like a data extecution prevention error or explorer error. i would really appreciate some help. My job is a lil hectic so i may not be able to check this often so preferably id appriciate an answer through email to e-mail address removed to prevent spam and please make it clear what the message is about i delete without reading if it doesnt seem ligitamit
thanks

 

Welcome to MajorGeeks.com, please follow our standard cleaning procedures:

Run ALL the steps in this Sticky thread READ & RUN ME FIRST Before Asking for Support

• Make sure you check version numbers and get all updates.

Very Important: Make sure you tell us the results from running the tutorial...was anything found? Were you unable to complete any of the scans?...Were you unable to download any of the tools?...Did you do the on-line scans as suggested? etc.

After doing ALL of the above and you still have a problem, make sure you have booted to normal mode and run the steps in the below thread to properly use HijackThis and attach the log:

Downloading, Installing, and Running HijackThis

• Make sure you also rename HijackThis.exe as suggested in the procedures. Use analyse.exe for the new name. This is very important due to some new infections going around..

When you return to make your next post, make sure you attach the following logs and that you have run these scans in the following order too:

• CounterSpy
• AVG Antispyware log - ONLY IF NEEDED you were not able to run CounterSpy
• Bitdefender - from step 6
• Panda Scan - from step 6
• runkeys.txt - the log from GetRunKey.bat
• newfiles.txt - the log from ShowNew.bat
• HijackThis

NOTE: You can only attach 3 files in a single message so it will require that you use two messages to attach all of these logs!