Glitches in my new iMac

Unexpected glitches have occured. (1) characters suddenly appear in
uppercase though caps not in use.
(2) Opening and closing files slows down - the file slips back to its folder in slow
motion.
(3) folders/files refuse to open with the double click. Possible with 'file',
open... If this happens even when the file opens, it can't be worked on.
Only way to correct is to switch off and reboot (twice or three times)
I've re install os software to no avaIL
MANY THANKS
JOE

Hi Joe, if a re-install didn't help, I would suspect hardware.
Have you run Apple Hardware Test:
1. Disconnect all external devices from your iMac except the keyboard and mouse.
If you have an Ethernet cable connected, disconnect it.
2. Insert the Mac OS X Install Disc 1 that came with your iMac.
3. Restart your iMac and hold down the D key as your iMac starts up.
4. When the Apple Hardware Test chooser screen appears, select the language
appropriate for your location.
5. Press the Return key or click the right arrow button.
6. When the Apple Hardware Test main screen appears (after about 45 seconds), follow
the onscreen instructions.
7. Apple Hardware Test displays an error code if it detects a problem. Make a note of the
error code before pursuing support options.
If hardware test does not mount or does not run bring the computer to Authorized Apple Repair.
Even if hardware test finds nothing, I would call AppleCare and ask for a new iMac.

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