Tohle se tu řešilo už Xkrát - zadej do místního vyhledávače nebo Googlu "IRQL not less or equal blue screen" . Jedna z možných příčin je chybný driver a následně vadná adresace v buňkách paměti.

Možná ti pomůže tohle Google ti to přeloží:

Re: Blue screen Driver IRQL not less or equal
The BSoD is caused by bad drivers or system devices. follow these steps to remove unused drivers to see if its an unused driver is causng the problem:

1. Press [Windows]+[Break] to bring up the System Properties dialog box.
2. Select the Advanced tab and click the Environment Variables button.
3. Click the New button below the System Variables panel.
4. In the New System Variable dialog box, type devmgr_show_nonpresent_devices in the Variable Name text box and 1 in the Variable Value text box.
5. Click OK to return to the System Properties dialog box and then click OK again.
6. Select the Hardware tab and click the Device Manager button.
7. In Device Manager, go to View | Show Hidden Devices.
8. Expand the various branches in the device tree and look for the washed out icons, which indicate unused device drivers.
9. To remove an unused device driver, right-click the icon and select Uninstall.