On boot up i get an error message that the memory

if you have any discs in the dvd remove them... it should boot to the hard drive when it doesn't find anything in the dvd. if you need to install an operating system put that disc in the dvd and boot from it. during the installation it will start to run off the hard drive. when you are done installing remove the installation disc.

Try to re-install 2 Operating systems use this order,
1,Install windows XP by booting the XP cd,
2,and then install Win 7 by booting from Win 7 cd.
Then while you restart computer there will be a prompt menu asking to select OS to start. Thanks

Sounds like it's probably the power supply. The computer takes more power to boot up than to run, so if it can't get enough wattage it can't boot all the way up, and it will shut down and try again.

If you're comfortable opening your computer up, you can test the power supply connectors with a voltmeter or multimeter to verify. A new power supply is typically only $30 or $40.

For windows to work, it needs the card's drivers to display properly. The bios will display, and the beginning of windows load messages will show, but then it switches to the installed display driver. Take the card out, and use the old display method, and load the drivers for the new card. Then set the screen resolution to 800x600 and the shutdown, and install the new card. The bootup should go correctly, and once the new drivers are in, then set the resolution desired.

Probably your disk is scratched or bad

your bios settings are not saved because of low voltage of CMOS cell.
Change your cmos cell from motherbord.
CMOs cell gives power to bios flash memory so settings saved.

There is a system error in the system. Would be hard to determine cause of the error without viewing an error log. I recommend, using system restore and setting the pc back to a time it worked good. Otherwise, download a free registry error cleaner and registry optimizer called "glary utilities" from glaryutilities.org
Run the program to get all the bugs out of your pc

Is it recognises Hard disk or not?
reply

i will try to solve u r problem

BAD_POOL_CALLER is a stop error message that is caused because of problems with the memory management.

There is a list of more than thirty such causes that can give you this error message. If the stop error is consistent every time the system is rebooted, the following method will be effective in solving the problem:
* The hardware and RAM should be checked initially.
* Boot the system once again using the OS setup CD, or use a boot setup that has a GUI like BartPE.
* With RunScanner it is possible to use a memory test tool.
* Select a single account
* If all the accounts open then the system registry hive might be the problem.
* Locate the hive damaged and rename it, do not delete it.
* Create another hive from the backup or from the restore point.
* Initially uses the latest one and keep checking the restore points that come later.
* Avoiding harvesting any replacement hives from the hard drive booted Windows.
* After which compare the hives for differences.

This is one of the ways of fixing BAD_POOL_CALLER errors. Another method is to reinstall the OS but occasionally shows a disk read error or an error on the same lines. Switching the computer off for a minute or more and then switching it on can solve it since the error is only a slight glitch in the system operation.
The BAD_POOL_CALLER is seen for the first time after installing a hardware or software it is recommended that the computer be restarted. If it doesn’t solve the problem, the installation of the hardware or software should be checked for corrections. If the problem persists the installed hardware and software should be disabled, and the BIOS memory options like caching or shadowing should be disabled too.
The safe mode can be used as well to remove or stop components.
To enable the safe mode just press F8 when the machine is being restarted and select it from the Advance Startup options and correct the problem. The installation of the graphics card is another reason the BAD_POOL_CALLER error shows up. A simple reinstallation of the driver can solve the problem.
Microsoft has also acknowledged that the BAD_POOL_CALLER Stop 0xC2 error pops up when trying to print a document that contains a corrupt font.
A hot fix is available at www.support.microsoft.com

Common windows problem,you need to wipe your drive and reinstall your operating system