Calls excessive deferred Procedurwe (CPD) & material interruptions after installing Win 7 (64-bit)

After a clean install of Windows 7 Ultimate, I've had a pretty big problem. Whenever I try to transfer or backup files to a portable HD USB device only a few files are transferred and the CPU load then engulfs the system (85-92%) with hardware and procedure calls deferred (DPC) of the interruptions as shown by Process Explorer. Stop the backup/transfer or disconnect drives is not good - the use of the processor runs at a constant of 70-90%. Only a reboot gets rid of the problem. Here are the relevant facts and things I did to find the problem:

(1) I used three external HD drives, a HP Personal Media 1 TB and a hard WD 500 GB and a 1 TB IOMEGA. I tried all 3 external HDs on alternating ports USB - same problem.

(2) all discs worked perfectly before on my Vista-64 (PC) system and both drives work fine on both my other XP systems.

(3) my system is a HP Pavilion PC m9517c with a processor 2.3 ghz Quad-core, 8 GB of memory and a 1 TB HD, so the processing power is not the problem.

(4) I have tried the same transfer after a clean boot with all disabled menu items and services - same problem start.

(5) in Device Manager for each disk under the policies tab, I also spent the default selection of "Rapid withdrawal", which disables the cache to "best performance" that allows to write cache (it could be a problem of write caching since it will transfer a few files before it grinds almost to the stop of thought)-same problem writing.

It seems e problem a Win 7. Can anyone give me any help would be appreciated. HP has been less useful for their support and knowledge.

Problem solved! Thanks CharlesHP (graduate student). I spent a week on & off with HP support, both on the phone and by e-mail. They did not come close to understanding or solve the problem and you resolved easily. It took only the Microsoft hotfix that you me bound. Thanks again.

Tags: Notebooks

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