hi! my config before: amd cpu asrock board 4 GB RAM 2 HDD (500GB Samsung, 1,5TB Samsung) connected via SATA in IDE Mode what i changed: i added one 128GB SSD connected through a pcie 1x 2.0 contoller card i added another 4 GB RAM what i can do: i can boot from device i can install updates an sp1 i can install a driver for my grafik card but when i do a reboot AFTER that (grafics driver) i get a black screen. i can hear the sound that windows makes when the login screen appears i can, somehow without seeing anything, enter my password. then i see the background picture from the login screen and nothing more happens. when i press <STRG><ALT><ENTF>, which should open a window, i get a black screen again. Booting in safe mode makes the system hang at classpnp.sys for i while. What i noticed: this is the only driver that is written in capital letters What i already did: remove most everything but the SSD, mouse and keyboard. deleted partitons on SSD and reinstalled reverted to a config when grafics driver was NOT installed (works again then) changed to AHCI Mode for all drives used Radeon Driver 11.5 and 10.7 (<- which ist the one that works on my windows installation on the HDD) PLEASE HELP! I can provide more Hardware Information later

Try the following resolution: 1. Boot the computer to windows recovery mode. 2. Click Commmad Prompt, type in: rename c:\windows\system32\drivers\classpnp.sys classpnp.old ------------------------------------------------------------------------------------------------------------------------- 1) Reboot and press F8 2) Select "Repair my computer" 3) Select the keyboard layout and lanugage 4) When you reach system recovery tools, select System restore. 5) Select the restore point when it was working fine and restart the computer. ------------------------------------------------------------------------------------------------------------------------------ Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Try the following resolution: 1. Boot the computer to windows recovery mode. 2. Click Commmad Prompt, type in: rename c:\windows\system32\drivers\classpnp.sys classpnp.old ------------------------------------------------------------------------------------------------------------------------- 1) Reboot and press F8 2) Select "Repair my computer" 3) Select the keyboard layout and lanugage 4) When you reach system recovery tools, select System restore. 5) Select the restore point when it was working fine and restart the computer. ------------------------------------------------------------------------------------------------------------------------------ Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, After checking this issue, I suspect this is a hardware incompatibility issue, please check the following settings: 1. Unplug the new RAM for test. 2. Boot from DVD, run chkdsk tool to check your disk. 3. If it is possible, try another graphic card to see how it works. Alex ZhaoPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.