IMac struggling with constant pinwheel

Hi everyone,
I'm getting very desperate. My late 2008 iMac 24" is unable to perform simple tasks.
I run EyeTV near constantly when the mac is switched on, I think that's where symptoms first began.
It would suddenly crash more often before a recording or from waking up the screen.
Then TV programs would sometimes struggle to be played.
Most importantly the whole mac would freeze from waking up, either at the screensaver or at the normal home screen. When trying to restart sometimes it can't and a folder with a question mark appears. These symptoms have gotten progressively worse and found it harder to start up the mac again. Currently trying to back up files, but has been hard with the pinwheel coming most times.
I've tried using most troubleshoots, but the startup disk isn't recognised and no commands are either: cmdpr etc. So no hardware tests can be performed.
Please, any help would be appreciated

Hi, 2 ways to reinstall:-
http://docs.info.apple.com/article.html?path=Mac/10.5/en/8177.html
http://macosx.com/tech-support/mac/would-like-to-reformat-hard-drive-and-reinsta ll-osx/366.html
Hope these links help..the reinstall takes between 35-45minutes plus the Update time.
Be sure to Repair Permissions after reinstall & again after Updates..if the issue continues after that I would consider a trip to the Genius Bar or an Apple Approved Service Agent...L

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You can try an SMC reset, especially if there was a power outage.
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Try SMC Reset (unplug it from the back of the computer for 10 seconds then plug it back. in)
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<Email Edited by Host>

I don't know what AppleTV can handle as far as bit rate is concerned, but increase the bit rate as high as it will let you. You are taking DV which is 25Mb/s and compressing it. If you're making an H.264, you should get great results needing no more than 6Mb/s. Bear in mind, the higher the bit rate, the larger the file size.

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Hi,
I've seen thousands of posts about Bluetooth connection issues and interference and stutter/lag for both the Magic Mouse and Trackpad (affecting both Mac OS X and Windows under Boot Camp) but my problem is different.
To summarise my setup, I use:
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But during usage, the cursor stutters/lags frequently, and tap to click (when enabled) seems to get triggered by mistake all the time (even when I'm not touching the Trackpad or even at the computer, clicks get registered).
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SOLVED!
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The drivers for the Broadcom 802.11n Wireless Adapter have a setting called "Bluetooth Collaboration" that is Disabled by default. Enabling this option removes the problem instantly. My Magic Trackpad now works flawlessly, even if I stand 6 metres from the machine. It now works just as well as under Mac OS. The setting can be found under:
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Cheers

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Faulting module name: ntdll.dll, version: 6.1.7601.17725, time stamp: 0x4ec49b8f
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Faulting module path: C:\Windows\SysWOW64\ntdll.dll
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IMac struggling with constant pinwheel

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