I'm using a Dell Inspirion N5010, with synaptics touchpad support.  I used a registry cleaner (how stupid of me!) and it screwed up all of my drivers and now my touchpad won't work.  I uninstalled the touchpad driver from my computer, but when I try to instal it from the file Dell provides, it says "Installation failed."  I've tried system recovery, but it doesn't work (it told me it couldn't use system recovery because of a problem with AVG antivirus), and I tried the recovery option on the registry cleaner, but it doesn't do anything (won't restore any of the files). 

My soundcloud driver also had to be reinstalled, and now the handy little popup window doesn't show up when I adjust my volume (but it works, at least).  There's also some network problem, because I keep getting an error message about not connecting with some dll file.

I'm very close to just wiping everything and completely reinstalling windows, but of course I'd like to avoid that.  Any help would be lovely.