Computer performed well for 6 weeks, I was very pleased until yesterday when the Blue screen Error CODES appeared and shut down each time then to returned to the log in screen with no trouble with start up. It would not let me transfer to save large document or photo or music files without crashing after 4-5 minutes. There was a different code each time: IRQL not less than equal, page fault in non paged area, system service exception, etc. It only gives you about 15 seconds to read error screen before shutting down. Maddening. So whatever you put on a refurbished computer, you're going to lose. It failed to go to  previous restore points in time. This is the third time a DELL computer has without warning crashed on me and lost my files. NEVER AGAIN. If you have a DELL never trust it. They obviously didn't fix the problem causing the return when it was "renewed" for the next sucker.