Every TortoiseSVN action I take from the context menu in Windows Explorer is extremely slow. For example, it takes ~91 seconds to open the About dialog. Results are the same for any other TortoiseSVN action I take from the context menu. However, if I login to a local administrator account, I don't have this problem. Additionally, once a TortoiseSVN dialog finally opens, further actions that I take within that dialog don't seem to be slow at all.
I'm running v1.9.5.27834 (and I've tried rolling back to earlier versions.) I have IPv6 disabled across the board. I've uninstalled and reinstalled multiple times, as well as manually removed all applicable %APPDATA% folders and registry keys I could find. I have no mapped network drives.
For what it's worth, I'm on a newly-imaged machine. I have a feeling that the backup restore restored some settings for my user account that are causing some conflict/timeout here (hence my uninstalling and removing %APPDATA%\TortoiseSVN, %APPDATA%\Subversion, etc.)