Recently, I installed MS Office 2010 RTM and along with all the “cool” features, I got something which took me by surprise. The Local Disk (Q). I wasn’t really sure if I got affected by some kind of virus.
Take a look at my drives…

I tried, “Ejecting” this drive but couldn’t. I tried getting into this drive and all I could get was “Access Denied”. Disk Management utility didn’t even talk about this Q Drive.

After a little research found that this was because of Application Virtualization Desktop Client.
I tried uninstalling this from Add/Remove programs, but neither there were any errors in uninstall, nor I got this out of my system. A little more search and I found this article. Apparently, this uninstall requires a reboot. One reboot… and I am all set.
UPDATE: I thought I was all set, until another reboot
I rebooted my machine to find that Q drive back. Uninstalled App-V again, and disabled both the following services from Start –> Run –> Services.msc
So far… looks good!!!
Hope this helps,
Rahul