1. How many files are listed in C:\ ?
This number comes from my last virus scan last weekend. 585,518
2. What app is failing to install.
I am trying to install RegRepair. It all started when I went to upgrade MCEBuddy. I had to manually uninstall the previous version. When I went to install the new version, the installer would shut down with the following message: "The advertised application will not be installed because it might be unsafe. Contact your administrator to change the user installation interface option of the package to basic". Since I did a manual uninstall, I assumed I deleted something in the registry. So I did a system restore. When that didn't work I wanted to try RegRepair. This is when I got the original TMP message in the original post. I tried installing a few random apps and get a "Can not create temp folder archive" During my app install testing, I deleted Firefox off the computer and went to download again from Mozilla. The only workaround the can not create temp folder archive error was to run the install in IE.
Yes, I am the administrator. I even tried running the installations by right clicking and running as administrator.