I have Windows 7 Pro and Premiere installed on this SSD. It has only 15 GB free. There must be some large hidden files. Any suggestions to reduce usage on my C Drive?

Could be lots of things. Here's a place to start.

Guide to Freeing up Disk Space under Windows 7 - Scott Hanselman (http://www.hanselman.com/blog/GuideToFreeingUpDiskSpaceUnderWindows7.aspx)

Specifically related to Adobe, most of the apps have cache files and/or a database. Each project can have preview files which could be on the system drive. Check Premiere Preferences -> Media section to see what's going on there.

GL

I have made changes to accommodate this small SSD. My advice is to purchase a MUCH larger one if you are doing video editing.

I have a 120GB SSD and CS6 Production Premium on Win7 and I've got 50GB free. It's not hard to keep the system drive clean. Cheers

Shift your page file and,as Kawika suggests, your Adobe media cache and database onto other drives.

Move your Documents, e-mails, etc. from your user folder on C: to another drive.

However, the more RAM you have, the bigger your swap and hibernate files will be. I have 32 gigs of ram, and it also takes a toll on my SSD. Unless you are willing to work from a slower drive,

Or unless you're willing to disable hibernate as per Kawika's link.