
(Bloomberg) -- In what will go down as the most spectacular IT failure the world has ever seen, a botched software update from cybersecurity firm CrowdStrike Holdings Inc. crashed countless Microsoft Windows computer systems globally.Most Read from BloombergGlobal IT Crash That Blocked 911 Calls and Grounded Planes EasesZuckerberg Calls Trump’s Response to Shooting ‘Badass’Airlines Start Digging Themselves Out of Epic Flight DisruptionsCanada’s Immigration Minister Has a Message for Foreign Stud

(Bloomberg) -- Stocks fell at the end of a week that saw tech megacaps getting hit, with the industry that has powered the bull market due to report earnings over the next few days.Most Read from BloombergGlobal IT Crash That Blocked 911 Calls and Grounded Planes EasesZuckerberg Calls Trump’s Response to Shooting ‘Badass’Airlines Start Digging Themselves Out of Epic Flight DisruptionsCanada’s Immigration Minister Has a Message for Foreign Students: You Can’t All StayBrookfield Lines Up a 36-Year

Russian officials boasted on Friday that Moscow was spared the impact of the global IT systems outage because of its increased self-sufficiency after years of Western sanctions, though some experts said Russian systems could still be vulnerable. Microsoft and other IT firms have suspended sales of new products in Russia and have been scaling down their operations in line with sanctions imposed over Russia's war in Ukraine, which Moscow describes as a special military operation. CrowdStrike, a U.S. cybersecurity company whose widely used "Falcon Sensor" software caused Microsoft Windows to crash, had no known customers in Russia.