I'm a first time poster and not all that computer savvy; but here is what happened and I would like some advice/help on what to do next or do nothing at all...
Just bought a newer model Dell Vostro 270 off ebay; got it two days ago. The seller said he reformated and reloaded the Win 7 pro OS and all drivers. The disks/CDs were included with purchase. Initially, the PC worked fine. I could log on to the internet and things were working smooth. The PC had no anti-virus protection so I downloade the free 2014 AVG antivirus (which I was using on my older Win XP machine... which is why I decided to upgrade). I also downloaded the free Foxfire browser because I've heard and read it is better than IE.
So far so good... things working great. Next, I had read about the advantages of additional malware programs along with AVG, so I downloaded the free Malewarebites... this is where the problems started. After I ran the first scan with Malewarebites, it said there were several files that were bad and deleted them; these files were apparently not flagged by AVG. After the reboot, I could not connect to the internet in either Foxfire or IE. The error message said something about the proxy server not accepting/recognizing my log on, or something like that.
Now, irritated and frustrated that I had messed up my new-to-me PC, I started trying to fix the problem. I attempted several "system restore" attempts to no avail. I finally figured out how to disable AVG so I could do the system restore, but it didn't seem to help or the system restore never sucessfully completed.
I have a lap top PC that I use sometimes and connected it to my modem, got online and googled the problem about not being able to get on the interned after downloading malewarebites. I read one of the posts that mentioned Combofix and where to download it and how to run it. I downloaded the Combofix on to a flash drive and then run it on my new-to-me PC (that I thought I had ruined) and, that fixed the problem. I can now log on to the internet and it seems to be working like a charm... fast and smooth.
After I was able to get back on the internet with my new PC, I ran an AVG scan and it picked up a trogenhorse virus and deleted it. I'm not sure if that was related to the Combofix scan or not. All I know is that my PC seems to be working fine at the moment.
After that wordy background (sorry about that:-) here are my questions... What do I do now? Why did this happen when I downloaded malewarebites and ran the malewarebites scan? Do I just leave well enough alone? Should I uninstall the Combofix program and related files? I can post the Combofix report if you think it would help...
Thanks so much for any assistance!
P.S. I forgot to mention that in the process of trying to fix the problem that Malewarebites apparently created, I uninstalled Malewarebites. Don't think I want to download it agian either... for now.
Edited by Guitar56, 11 April 2014 - 10:55 AM.