About two weeks ago, my McAfee virus program told me it had found a virus. I ran the complete scan and it found and deleted 10 or so files. However, two problems persist: 1. MSConfig tells me that a startup item called "userinit" continues to startup, even after I select it to NOT startup. The command is c:\users\Kyle\AppData\Roaming\twex.exe. I can't delete the file manually either, because it says it's in use. 2.I'm still having a variety of small problems that started at the same time as the virus. It seems bizarre that they could all be related, but I have no other explanation. These include: the hiding of my entire c:\users\kyle directory; the inability to make any printer the default one (when I try, nothing happens, and no little check mark appears next to the one I selected); some programs (Acrobat, Excel) won't print at all because it says I have no printers installed, though I clearly do; lots of random crashes in Firefox, even with plug-ins turned off, which has never happened even once before. These are the only visible problems from the virus. The most frustrating thing is that McAfee, and now AdAware AND Anti-Malware all say the system is clean. Is it possible that twex.exe is actually an okay file and the virus did some kind of lasting damage that messed with my printer and Firefox? Or is it more likely that twex is a consistent problem that needs fixing still?

download malewarebytes and try a scan?

You should scan your computer with updated Malwarebytes in Safe Mode. You should also delete all temporary files, temporary internet files, browsing history and cookies. You should also disable all unwanted history from the startup item. Start > Run > type msconfig > startup tab > uncheck all unwanted start up from the list. you can use only security startup, anti virus startup, internet connection startup.