Mac not doing simple things like copying files and other general tasks?

[canada eh]

For the fast few days I have been having problems with my Mac on its overall reliability.

A few days ago I took the back off of my MBP to clean some of the dust, and put it back together. now when I start up I get a bar under the spinning gear that disappears after a few seconds. My start up and shut down have been really slow and often hangs on shut down, when I first installed Snow leopard, every thing was instant.

Recently I have been having weird application crashes and problems with installing programs from a DMG (steam). iTunes has given me errors and so has Mail, it just suddenly crashed and asked me to rebuild the messages constantly until a re-boot.

I would re-install OS X and use my time machine back ups to restore all of my files but, I think I may be on my last licence of iWork, I went to install it on another mac and it tole me it was invalid, so I am worried of loosing my current licence. Unless that is carried transferred in a Time Machine back up.

I use Mobile Internet as my main internet connection, it is all I can get as I am in a rural area, and I have been having problems with it initializing some times and connecting. My ISP is Bell Canada.

I would just like some advise on what is going on, when I took the back off I didn't touch anything, and I have done my own hard disk upgrade months ago.

 

[GadgetGeek71]

Sounds like an ESD problem. Did you ground yourself before touching the electronics inside?

 

[canada eh]

Sounds like an ESD problem. Did you ground yourself before touching the electronics inside?

I don't even think I have touch the motherboard or any other circuit board, just the plastic at the back where the dust would have collected. I have done it before and no problems, other than these little software problems the computer has worked great for me.

 

[canada eh]

OK I got fed up with it and did a full re-install, and every thing seems to be fine now. it got to the point where it would hang at start up and even before it would hang it was like 5 mins. I just hope my Adobe CS3 and iWork will work with licences after I put them back from my time machine back up.