Blue screen: driver irql not less or equal

By joe albers
Jun 30, 2008
  1. hello
    i have been using a hand me down computer that has some obvious issues. now i cant go online unless i am in safe mode with out the blue screen popping up and saying driver_irql_not_less_or_equal. in the meantime my taskbar and desktop have also disappeared and i can only use taskmanager on administrator even though my account has an administrator title also. please help me, i am novice to computer repair and am clueless.
    joe albers
  2. Route44

    Route44 TechSpot Ambassador Posts: 11,984   +72

    driver_irql_not_less_or_equal errors are caused by faulty drivers or buggy software. At this point we don't know what driver or drivers are cauing this.

    In Safe Mode do the following: scan for viruses, malware, etc. What security software does this PC have?
  3. joe albers

    joe albers TS Rookie Topic Starter

    i installed Defender Pro 5 in 1 but it never ran correctly so i uninstalled that and installed a freeware called avanst antivirus. i am not so sure that it works all that great however
  4. Route44

    Route44 TechSpot Ambassador Posts: 11,984   +72

    Avast is actually very good. Many, many people run it including myself on my second family rig. They update at least twice a day their virus definitions.

    I don't know anything about Defender Pro 5 in 1. Were you having BSODs prior to installing yhis software?
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