windows/system32/drivers completely missing  

Hello everyone. my girlfriend started complaining yesterday that her computer was running extremely slow so i remoted in to clean it up a little bit and see what i could do. I went to run hijackthis and to my suprise it came back and said it would not be able to give me a accurate scan because it couldnt access the host file. so i started browising to the location only to find out that it doesnt even have a drivers fold under system32, let alone ETC/hosts file. The computer is windows 7 64 bit. I have full adminstrator privelages. I tried to make a drivers fold but it started telling me i didnt have access. I ran an extensive scan with MBAM and avast but was unable to come up with anything. i check out all the installed programs and services just to see if i could see anything out of the norm but there was nothing. hijackthis had a few things with IE that i fixed but it was nothing major just the normal crap from browsing and toolbars. I also went to MSCONFIG and made sure there was nothing running except what needed to be, I took it down to safemode without going into safemode and still had no luck. Any ideals would be great, i dont want to have to reinstall windows but i am completely out of ideals and it would seem if something is able to remove my drivers folder it might be a good ideal anyway.

I have it as show hidden files. still no folder there.

You could try installing pandora recovery in case that some of the files are deleted in near past, and simply restore them back.