Take the C301nr to 64 Bits!
If you consider going to 64-bit computing an "upgrade," then do what I did:
Flash the BIOS with version F.24 A* and install a Celeron M 520** (SL9WT).
Vista 64 Home Basic*** installed without a glitch.
The 64-bit drivers included on the Vista 64 DVD provided full functionality for the C301nr except for Quick Launch Buttons (same as in a 32-bit installation, if I recall). HP's download page for the C301nr has the 64-bit QLB driver, as well as newer drivers for some of the ones installed by my Vista 64 DVD.
After "upgrading" to 64 bits, my Windows Experience Index increased very slightly for the Processor/Calculations per Second" component, but it feels more stable and responsive than 32-bit.
**BIOS F.24A "provides support for Celeron M 530." (That's why I tried it with the 520 that I bought for $30.)
*** I installed the RC-1 of Vista 64 Home Basic because I didn't have Vista 64 Gold (RTM). So your mileage with drivers may vary. It appears that even though the CPP/Beta time expired before I even installed RC-1, since I didn't provide a key or auto-activate online, it will let me run RC-1 for 14 days.
The Celeron M 520 clocks at 1.6 Ghz, slightly slower than the stock Celeron M 430 that came in my C301nr. The Celeron M 530 is clocked at 1.76 GHz.
CPU-Z (v. 1.39) reports the Celeron M 520 as a Core Duo (Core 2 Duo?) Merom CPU, but we know better. I may need a newer version or a 64-bit version of CPU-Z.
The Windows Live OneCare Beta 2.0 (just out) is now 64-bits.
I'm so sick of taking this C301nr apart and putting it back together. (I had tried many of the same CPU upgrades mentioned in this thread before FINDING this thread.)
The latest BIOS (F.24 A) file size is almost twice that of the previous F.14 A file size. Do you suppose the new BIOS now supports any of the Core CPUs already tried and mentioned previuosly in this thread? (See CPU-Z, above.) Is anybody ready to try AGAIN with a Core CPU?
I am also very eager to know if my upgrade to 64-bitting will allow the C301nr to recognize more than 2 GB of RAM. (Wish I could afford to try it!) Anyone?
Please chime in, readers.