Some times the CAPS Lock key may be on, so please make sure that the CAPS Lock key is off.
If the issue still exists, I request you to perform the full system recovery using the recovery disks. To perform this full system recovery, you can use the recovery disks that you have created using the recovery partition.
Use the recovery discs to restore the PC by following the steps below:
Insert the recovery disc in the optical disc drive and start the computer.
If the computer is running, insert the recovery disc and immediately click Start
and select Restart to force the computer to start from the recovery disc.
When prompted, Press any key to boot from CD or DVD, press any key on the keyboard.
Allow the recovery disc to start and load the required files while the Microsoft loading screen is displayed. It may take several minutes to load the required files.
When the HP Recovery Manager window displays, click Advanced options , System recovery , and then click Next to open the Recovery Manager.
Follow the on-screen instructions and perform the required actions.
Do not interrupt the recovery process even though the computer may restart and the Windows desktop may display at various times.
When prompted, follow the on-screen instructions to Backup the user files.
After performing the backup, when prompted, re-insert the recovery disc, and then click Next to continue the recovery process.
A status box is displayed to indicate the status of the recovery and the estimated time remaining.
If you used multiple discs when you created the personalized recovery discs, follow the prompts to remove the first disc and insert any requested discs.
When prompted to Insert the Supplemental driver disc , take one of the following actions:
If you purchased a replacement recovery disc from HP, and it included a Supplemental driver disc, insert the disc and click OK or Next . The recovery program checks the supplemental disc and installs the specific needed files.
After the Supplemental files are installed, a prompt is displayed to remove the Supplemental disc and insert the original recovery disc.
If you purchased a replacement recovery disc from HP, and it did not include a Supplemental driver disc, click Skip or Cancel . The recovery program will ignore the request and install the next file on the recovery disc.
If you created a personal recovery disc, press Next to continue.
Continue following the on-screen instructions to complete the recovery process.
If you have not created a personal recovery disc, or the recovery disc fails or become corrupted, see HP Notebook PCs - Order Recovery Discs for Vista as your notebook is preinstalled with Genuine Windows Vista Home Premium with Service Pack 1.
For detailed steps you can refer the provided web link:
NOTE: Clicking the above link may give an error indicating that it is invalid.
If this occurs, copy the link and paste it on the address bar in your browser until the complete address is displayed in the Address box.
If you do not have the recovery disks you can order these recovery disks from the local HP phone support. Please use the provided phone number to contact the local HP phone support.