Hi...I'm new to the forums. but I've been working on macs for a while now. this has baffled me. Monday, the 26th...my powerbook 1.5 Ghz starting acting up. What i mean by this is, the pinwheel would start spinning for no apparent reason, like roughly 30 seconds or so and i wouldn't be able to do anything. i was only running firefox. i'm used to running 5 or so programs open at the same time with no issues. so i restarted the computer. it was fine yesterday (the 27th)...but it seems as if it's come back again today. i restarted my computer...first got the gray screen...restarted again...got the apple screen...restarted again and everything came up...but it took a real long time to just finish rebooting. now...i double click on anything on my desktop...and it takes forever to open up. i mean...i must've clicked it like 5 minutes ago (at least) and it's still not open yet. the cursor is still a pinwheel. i have my settings so that it shows the seconds on the time...and i usually gauge that if my computer's just frozen. but the time's moving normally. i have my dock on autohide and there are no problems with it. i bring my cursor down..and it pops up as normal and i could shuffle thru em easily. i tried opening an application..but now the dock is frozen and i still have the pinwheel going. i don't know what to do..please help.