opening screens frozen

Since updating to 10.8.2, I've had many opening screens frozen. The only cure is "pulling out the plug" and putting it back. Any suggestions, please.
(*_*)

That's not really enough info to go on. Need more troubleshooting.
Have you tried booting from the recovery partition and using Disk Utility to repair the drive?
- hold option key down after restart to get the boot volume menu.
Or, a Safe Boot (which also repairs the drive)?
- hold shift key down after restart gong sound, until you see the progress indicator. If no errors are reported, try a normal restart next.

Sorry about the late reply. Yes, I used the disk utility from the recovery partition, and also started with the 10.8 disk and used the disk utility from there. I also used Onyx and CleanMyMac. I will try the shift key test now. Thanx. (*_*)

I tried the safe boot and no errors were reported. (*_*)

P.S.
I'm not sure this has anything to do with the frozen screen problem - but perhaps?
When I first updated to 10.8 " Contacts" did not have my addresses. After help from Apple support and using Time Machine, I found them again. However, since that time, whenever I open up the iMac, a Text message appears that is in some form of programming language. Many times I cannot quit it and have to restart. It does appear when the screen is frozen.

joyss said:

... a Text message appears that is in some form of programming language. Many times I cannot quit it and have to restart. It does appear when the screen is frozen.

Click to expand...

It would be Very unusual for some sort of programming language text to appear. Please, write down the exact message and tell us what it is.

There are many pages of stuff. I'm sending the beginning and the end.

bookmark88 $ɧ…µA˘$

Applications

Contacts.app
¸∆
◊z

<LAµŒ




Macintosh HDÄ∆◊îA∞6ˆ$

46BF72AF-36B0-3E58-8EEB-AE761D4B4315
Å
Ô?
Ô?



/b$
icns$bTOC his32s8mk
ic11

.
,
,
,
,


ending with
.
.
.
.

WÖ@!PÖ@!PÖ@!P<Dj
ÅB†(
ÅB†(
ÅB†(
Åáà¿ˇπj∆Ÿ∑Èç Macintosh HD∆´C∂H+∆¸ Contacts.app◊ÀÜDé Applications∆´{ˆ∆¸ ˇˇ˛ˇˇˇ
∞˛

OK, that's not a programming language. But it does appear that your contacts file is corrupted.
Did this start happening before or after using CleanMyMac?
I think you're going to end up reinstalling Contacts and re-importing your contacts.
If there's an Apple store nearby, I'd go to them for help.

It happened after Apple helped me regain my contacts. Now, my LaCie backup unit does not show up on the finder. Oh well, I'll contact Apple again. Thanks for the help. (*_*)