Right so i updated the bios and reformatted all offline, then suddenly when in windows it says usb device not recognised the screen starts tearing up and now when i try to login someone is constantly pressing keys like llllllllll or tttttttttt etc.
Is there anyway i can sort this out or the pos that's harassing me?
I had same issue back in October decided to bought Sabrent USB to Dual PS/2 Cable to continued used my Microsoft Internet Keyboard PS/2 for next PC motherboard upgrade without PS/2 ports after read reviews but after every 5 days the adapter misbehaved caused my keyboard press keys like llllllllllll and tttttttttttt and restarted PC after wake up from sleep just like other adapters brands reviews customers reported same issues. 2 weeks later I removed adapter and plugged keyboard cable into PS/2 port and issues did not came back every 5 days. Shame Microsoft did not made Internet Keyboard with USB cable 20 years ago so on Cyber Monday I looked around for new USB keyboard with calculator and sleep hotkeys and found Cherry KC 1000 keyboard looked ideal for me and ordered it, expected delivery today.
I wondered what keyboard you use then I looked at your signature noticed you probably used Logitech G19S keyboard on your ASUS Maximus Z790 Hero motherboard?
I googled Logitech G19S and found the keyboard used AC power adapter!!!!
OH MY GOD! I was shocked and horrified just realised you went through same issues with AC power adapter and USB ports I experienced about 15 years ago on my previous PC case and the same issue on my sister old PC case.
If you actually used Logitech G19S keyboard USB with AC power adapter on your ASUS Maximus Z790 Hero motherboard. I need to WARN you must PLEASE unplug Logitech G19S keyboard AC power adapter IMMEDIATELY to avoid further damage to motherboard back panel and front panel USB ports while PC is powered on triggered USB Device Not Recognised error messages!!!!
People had same issue if they plugged in USB devices with AC power adapter while PC is powered on.
This is a two-part question. Both parts are directly related. 1.) When my device is charging (AC Adapter plugged in), my USB ports don’t function properly. Devices with a large current draw (I.E. my iPhone) constantly connect & then disconnect. Low-power devices (I.E. usb mouse, flash drives)...
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22 years ago back in 2000 I had very old USB A4 flatbed scanner and HP LaserJet 4L printer both had AC power adapters, If I plugged in AC power adapter while my PC was powered on ran Windows XP, I noticed screen was flickered and teared up I thought that was fine and normal. But 8 years later in 2008 I upgraded PC with new case which was my previous PC case with 2 USB 2.0 ports on front panel, I plugged in HDD docking station USB cable to top USB port on front panel and plugged in AC adapter and screen flickered and teared up, I used it to clone hard disk with Acronis True Image then a week later I plugged in my 32GB USB memory stick on top USB port and Windows triggered USB Device Not Recognised error message. It still showed up same message everytime I tried plugged in USB stick on top port then I tried bottom port and surprised it detected fine. I decided to plugged in USB HDD docking station on top USB port and Windows flickered teared up with USB Device Not Recognised error message. At that point I finally realised AC power adapter can cause electromagnetic interference on USB ports then from that point I kept remind myself everytime if I want to use printer or HDD docking station with AC power adapter, it very important I must power off my PC first before plug in AC power adapter and turned PC power on. This safety method seemed worked whole time with USB bottom port on front panel and USB ports on motherboard back panel all still worked fine with only 1 workable USB port and 1 dead USB port on front panel.
Back on 3 February 2019, after my sister texted me said she no longer used her PC and asked me if it is worth throw it away and I refused because it is very valuable and hard disk still contain important data so I wanted the case which I build for my sister. After powered on PC first time I checked all ports to see if it is worked but I discovered 2 USB 2.0 ports on front panels did not detected my USB memory stick. I thought "Is USB 2.0 on motherboard fried?" I decided to transferred motherboard to my PC case and I removed all cables from motherboard then when I removed USB 2.0 cable from motherboard and shocked to see the cable side warped and realised my sister or my nephews used USB printer or USB docking station with AC power adapter often caused USB 2.0 pins to melted. Wow interesting! I took pics of it back that day.
After completed transferred motherboard to my PC case for test on motherboard USB 2.0 port and I was surprised found it was worked fine and pins not damaged. Tested my 32GB USB stick on 2 ports on front panel was detected fine had showed data on stick. I had thought about get dual USB 3.0 front port cable to replaced damaged old dual USB 2.0 port cable but struggled to find one that matched the front port with 2 audio jacks.
So it seemed to me that OP keyboard AC power adapter caused electromagnetic interference on USB ports, probably graphic card and HDMI cable too that caused screen flickered and teared up. Not the bluetooth hacker caused it. I suggest OP to inspect USB ports on motherboard back panel to make sure it not damaged and USB 2.0/3.0 front panel cable plugged in motherboard are not melted like USB 2.0 cable from my sister PC. OP can try use keyboard with USB cable only WITHOUT AC power adapter! or use touchscreen keyboard on taskbar instead or get a new USB keyboard.
You need to be really very careful with USB devices with AC power adapter from now and remember to powered off PC first before plug AC power plug in for safety reason to avoid electromagnetic interference.