Hello, My relative's computer started getting STOP errors last week (her computer's christmas present to her, lol). So far she has gotten 2 and each time she received them, she was either playing or loading The Sims 2 (coincidence or not, I'm not sure). I have tried analyzing the minidumps via WinDbg. The first, according to WinDbg, pointed to: arusb.sys, with the STOP error 0x000000C5 (0x002932E4, 0x00000002, 0x00000001, 0x805515A1) After she restarted her computer after this first BSOD, she sent an error report to Microsoft as Windows reported recovering from a fatal error. Microsoft pinpointed ALCXWDM.SYS (Realtek AC'97 driver) as the problem, but WinDbg did not as far as I can tell from my limited analysis so that may or may not be a different issue. The second, according to WinDbg, pointed to: USBPORT.SYS with the STOP error 0x000000C5 (0x002932E0, 0x00000002, 0x00000000, 0x8055196D) Her computer specs (Acer Aspire T320) are as follows: - Windows XP Home Edition SP3 (32-bit) - Intel Celeron 2.8 GHz - 2GB RAM - NVIDIA GeForce FX 5200 256MB (this was an upgrade from her original integrated Intel graphics so that she could play The Sims 2) - 80GB Hard Drive (FAT32) - ESET NOD32 Antivirus 4.2 installed - TP-LINK TL-WN821N 11N Wireless Adapter (for her Internet) I tried googling the 0x0C5 error, and I think that it is often a driver or hardware problem. Since both STOP errors had some reference to USB ports (arusb.sys and usbport.sys), I assume it would be her USB ports failing, or the devices connected to the USB ports? The TP-LINK Wireless Adapter is connected via USB, and so is her Lexmark 2200 printer (but the printer is off). The STOP errors have only occured when she's playing The Sims 2, and as far as I know, that doesn't require the internet, although the adapter is still on. How can I verify if it is a USB port(s), the Wireless Adapter, or something completely different that is causing the STOP errors? I'd be more than willing to provide more information if required. I'd be grateful for any assistance that anybody could provide (and so would she). Hope everyone had a great Christmas.