PROBLEM: [NOTE: I installed W10 for the first time, a couple of days ago.] When playing videos on Firefox (70.0.1 (32-bit)) and on Foobar2000 (with foo_youtube component, both up to date) the audio seems to play fine but the video slows down. Foobar (foo_youtube) has a couple of options to synchronize the video but neither worked. It syncs/forwards to the correct frame but when the video resumes playing it begins to slow down, while the audio plays fine. WHEN IS THE PROBLEM ENCOUNTERED: [NOTE: I had W7 Pro installed for the past several years, no problem with video playback then.] Clean installed W10 Pro Build 1511 (VIDEO AND AUDIO STILL PLAY FINE AT THAT POINT). But, then, I let Windows install all the updates available and now the video and audio are out of sync as described above. Clean installed Build 1909: video and audio are out of sync. (Re-installed Build 1511: the problem goes away. This is the current installation I'm running.) SYSTEM INFO: Operating System: Windows 10 Pro 32-bit (10.0, Build 10586) (10586.th2_release.151029-1700) System Manufacturer: Dell Inc. System Model: Inspiron 545s BIOS: Phoenix - AwardBIOS v6.00PG Processor: Intel(R) Celeron(R) CPU 450 @ 2.20GHz, ~2.2GHz Memory: 3072MB RAM Available OS Memory: 3062MB RAM Page File: 1551MB used, 2789MB available DirectX Version: 9Ex Card name: Intel(R) G33/G31 Express Chipset Family (Microsoft Corporation - WDDM 1.0) [NOTE: Inspiron 545s is no longer supported. (There is a BIOS update on the DELL site but everything else is for Windows 7 or older] WHAT I HAVE TRIED TO FIX THE PROBLEM: TROUBLESHOOTING: Ran the troubleshooting tools for sound and video. SOUND SETTINGS: Checked "Disable all enhancements". Changed the default audio format to 16 bit, 44100 Hz. Un-checked “Allow applications to take exclusive control of this device". DEVICE MANAGER: Disabled "High Precision Event Timer". Un-installed "High definition audio device" and restarted computer. POWER SETTINGS: Changed the "minimum processor state" of the power plan to 100%. Disabled "Fast startup". VIRTUAL MEMORY (PAGING FILE SIZE): Set to custom size (calculating according to my specs). BIOS: All settings set to default. I would really appreciate it if someone had any ideas on how to solve this. Currently I can't afford a new computer or new hardware (I've had several expensive surgeries lately, and I have at least one more to go) so I'm stuck with this PC. Thank you very much for your time!