Hi guys, I have a portable computer ACER8202 with WinXP SP2. I made format and installed a new freshcopy of XP SP2 (with all the drivers given by Acer in site and all updates from Microsoft until now). For some reasons (i don't know why) I was getting BSOD periodically with variables exit codes, all connected with "DRIVER_IRQ_NOT_LESS_OR_EQUAL" message. U can see some of them below: 1) 0x0000000a (0x00000000, 0x00000002, 0x00000001, 0x81fa4dae) 2) 0x0000000a (0x00000000, 0x00000002, 0x00000001, 0x823a4dae) 3) 0x00000019 (0x00000020, 0x8521f408, 0x8521f438, 0x08060008) 4) 0x000000c4 (0x000000b2, 0x8ebef200, 0x0000000c, 0x00000004) 5) 0x0000011d (0x00000000, 0x00000000, 0x00000000, 0x00000000) I made again a format and installed the Ultimate Vista x86 Edition (in the same laptop), now with all the drivers for Vista given by Acer again. The same Blue Screens exist. I ran "verifier" from Windows but I couldn't find the reason of those conflicts. I suppose that there are incompatibilities with some drivers or is it in general a hardware problem ? The full report after the crach looks like this (for one exit code when i'm running Vista): ---------------------------------------------------------------------- Problem signature: Problem Event Name: BlueScreen OS Version: 6.0.6000.2.0.0.256.1 Locale ID: 1032 Additional information about the problem: BCCode: a BCP1: 00000000 BCP2: 00000002 BCP3: 00000001 BCP4: 823A4DAE OS Version: 6_0_6000 Service Pack: 0_0 Product: 256_1 Files that help describe the problem: C:\Windows\Minidump\Mini111707-02.dmp C:\Users\***\AppData\Local\Temp\WER-41979-0.sysdata.xml C:\Users\***\AppData\Local\Temp\WERDDB1.tmp.version.txt Read our privacy statement: http://go.microsoft.com/fwlink/?link...3&clcid=0x0409 ---------------------------------------------------------------------- Is there any idea on this? How can I face it? Thank you in advance!