|If all you had was 68K of HDD space left, your system would even run. And if it really is that full, it's because you don't clean up after yourself.|
Make sure you've emptied the Recycle Bin. Some people seem to think that if they delete something & send it to the Bin, it no longer uses any space - wrong! Until the Bin is emptied, that drive space is unavailable for reuse.
Start cleaning house by installing CCleaner-Slim (last one of the following list) & running it:
Then start uninstalling programs that you no longer use. Check your My Documents folder for useless garbage & dump what you don't need. If you have important files or pictures, back them up to a disk or jumpdrive, then delete them from your system.