My friend has got 3 computers and he got them at different times (one 4 years ago, one 3, one this year). All of them either run windows 10 or 11. They have never transferred files with eachother. The only thing they have in common is that they have all been in his house and they all have been connected to his lan at least once. After an unpredictable amount of time, each one of them started to spam the c, the ctrl and the v key. Sometimes it does it for hours. Sometimes it doesn’t. We suspect that there was malware on one of his pcs and it spread to the other ones, but we’re not sure. No virus detection tool has been able to fix this issue. Has anything similar ever happened to anyone? Thanks in advance.