Win7 Hanging at Loading Windows....

[Belmont]

Ok so I installed windows 7 just fine. It started right off the bat and I installed the display drivers. So I restarted my computer and BAM it just stop at Sarting Windows with the windows icon fully loaded w/ animation. To fix that in my BIOS I enabled PnPOS, and it owrked after that. Then I tried to install disc imaging tools which are made for Windows 7 and it stuck at starting windows, though this time pnpos was already enabled and if it turn off APCSI ( or w/e) support it shows a bar for loading windows then restarts the comp in an infinite cycle. So I tried to safe boot and when loading the files it gets stuck at classpnp.sys. I have checked all over the internet and maybe 1 person had this problem with no replies lol - all the others when starting normally hteir windows icon didn't load while mine does. To fix this I did 12 system restores in a row then it decided to finally work again. Keep in mind I have ran 2 OSes (Vista 64 and Server 2008) on this setup. I forgot to metion it also did this with the windows updates and the driver updates for my mobo... I also tried every single BIOS I have for my mobo from April 'til now.

my comp specs are...

CPUhenom II 955BE 3.8GHz
GPU: Dual HD5870's
PSU: OCZ 1000W
RAM: 4Gb OCZ DDR2 1066
MOBO: M4A79 Deluxe

 

[aGreenAgent]

APCSI? What is that?

Does it boot into safe mode?

 

[RadiclDreamer]

Originally posted by: aGreenAgent
APCSI? What is that?

Does it boot into safe mode?

http://en.wikipedia.org/wiki/A...t_Controller_Interface

I think thats what hes trying to say

 

[aGreenAgent]

Oh....you can't enable or disable AHCI *after* an OS install, that will certainly make things not work.

 

[Gunbuster]

Do you have any USB card readers plugged in? Unplug them

 

[aGreenAgent]

^^^ Good idea, unplug any USB devices

 

[Belmont]

Originally posted by: Gunbuster
Do you have any USB card readers plugged in? Unplug them

I have tried booting with nothing connected but my keyboard, I also fully disabled USB once which didnt work. I also disabled every device possible. Did not work.

Also sorry about that acronym I threw out when I typed the first post I meant to say ACPI support.

One more thing...when I first installed the OS and was having hte boot errors it was because of my display drivers. I found this out due to being able to actually get into safe mode and remove hte drivers through the device manager. Now I can't even boot into safe mode as stated. Yet if I do like 9 system restores in a row it will randomly work and the display drivers work, though it does not make sense that I can not install any program that requires a reboot without it hanging.

 

[aGreenAgent]

I would just suggest reinstalling. You really shouldn't have even hit these errors to begin with. I even replaced the motherboard on my Win7 PC without changing the drivers (went from nVidia->Intel chipset) and Win7 didn't even have an issue with it. There's probably something wrong with your OS install.

 

[Belmont]

I'll reinstall once I get a CD drive from someone...I'll try tomorrow, but just wanted to tell you something thats happening now.....my mobo makes clicking noises when I scroll down a page on IE lol 1 click per click on my mouse wheel....

 

[hovenas]

Similar issues with a new HDD, a Radeon HD5770 and Win7.

Cant even get the thing to boot.
Have to turn the PSU off for a while to even get it to the BIOS...

Not my planned experience and all to reminiscent of my WinME purchase

 

[daw123]

Sorry to resurrect an old thread, but I think my experiences are pertient to this thread.

I had the same problem two days ago. I installed Win 7 Pro 64 bit last weekend since I was previously using Win 7 RC.

Two nights ago I had issues with programs freezing for no apparent reason. The CPU cores and RAM were not under 100% load/utilisation and there were no processes being resource hogs.

The first night it happened, I ran an anti-virus scan (AVG). That didn't find any viruses. I uninstalled AVG and installed and ran another anti-virus program (Avast). Again the anti-virus found nothing.

During the uninstall and install between the two anti-virus programs I realised that boot up was taking much longer than usual, since I did a reboot between the two.

I therefore realised that the problem was not virus related and I thought it could be a borked BIOS, due to the long boot up time. Hence, I reset the CMOS and loaded the back up BIOS settings.

This seemed to do the trick at the time (I thought maybe the CMOS battery was faulty - but the MB is less than a year old???).

The next afternoon, it took 15 mins for Windows start up.

I ended up doing a clean install of Windows and everything is working correctly now. I think it was a Windows automatic update, which messed up a system file. I've since disabled automatic updates.

Edit: I don't know what Classpnp.sys is, but it must be important during start up, since there are numerous search results on Google with people experiencing issues with this start up file.

 

[KlokWyze]

classpnp.sys is a SCSI hardware driver I believe.

My pc was hanging on this (classpnp.sys) today, but never getting past it as other have said, after 15 or so minutes. I assumed it was a bad HDD, bad sectors or bad mobo. Not the case.

Looks like a Plug and Play issue.

-----------------------------

My solution:

Unplugging my keyboard and mouse from a 4-port USB hub and plugging them directly into my motherboard. Shifting my old HP laserjet 4L, which is connected through a parallel-to-USB converter, to a different USB slot.

99% sure it was the keyboard and mouse being connected through the hub because I just started doing it yesterday or 2 days ago.

-------------------

Now, I've been reading up on this and there seems to multiple solutions depending on the motherboards being used. Some people fix it merely by changing PNP & SATA options in the BIOS.

My mainboard is a Biostar A785G3. Using a AMD Regor 250. Win 7/64 bit.

Hope this helps someone.