Hello, I'm also experiencing this type of problem. Everything worked fine, but one day this just started happening:
1. Hangs at start up on "loading startup settings" It literaly takes 4 minutes to open illustrator.
2. If I copy an object i.e. a rectangle, it takes at least 1 minute to copy it.
3. When pasting what I have copied it takes just as long
4. When opening a file it takes a long time too
I checked my Task manager and it says that the "Memory Usage" is up to 94,300K+ !!! I've defrag my drive, uninstalled and installed illustrator, repaired it, closed all the other programs, and still no results. Please help! Thank you so much in advance.