I just uploaded a big upgrade my automatic notifier told me of. I used the "express" method. This was yesterday. It said it would take effect upon restart. When I restarted, I got a blue screen, that said something about scanning & checking drives (5 of them I think) and it took several hours. Not sure how long, but It was at least 2-3 hours, maybe more, I just left & came back & it was still going. Took so long I thought it froze up for a minute, until it did show a percentage. Seems like that was after about 3 hours it was at 46% of the 4th thing it was going thru. Anyway, after that was over & I got logged in, I get another notice of more upgrades, so I download it & restart, this one only took a minute & the restart was quick, no big delay like the other. Okay, here's my question, what the heck was it, it seemed like it was doing a defrag or something. My computer is running much smoother & quicker today. I had also deleted a bunch of junk as I was running out of space on my 120GB harddrive I was down to about 5.7GB and got up to 16GB free, then I ran the compression feature & wound up with 18GB free this AM after it ran all night (that was a time consumer too) Someone told me there was a new upgrade, I told him it was running as we spoke. I'm just curious what it did, I never had one take so long to install upon restart. I did the Service Pack last month or whenever that was recently too.