is not a standard Windows or well-known software file. Its unusual name strongly suggests it is malware , potentially a Trojan or a unwanted program (PUP). Legitimate security software or system utilities almost never use slang or repetitive strings like "JAJAJA" (Spanish for "hahaha").
: Press Ctrl + Shift + Esc , look for "JAJAJA_Protect.exe" in the Processes tab. If found, right-click it and select Open file location , then End Task . Delete the file from the original folder. JAJAJA_Protect.exe
If you are seeing this file on your system, it is critical to take defensive action immediately: is not a standard Windows or well-known software file
: Check your startup settings ( Settings > Apps > Startup or Task Manager's Startup tab) to ensure it isn't set to run every time your computer boots. Red Flags to Look For : Press Ctrl + Shift + Esc , look for "JAJAJA_Protect
: Use reputable antivirus software to perform a full system scan. Security experts often recommend tools like Malwarebytes or the Microsoft Malicious Software Removal Tool (MRT) .
Are you seeing any or unusual system behavior since this file appeared? "jucheck.exe"--What to Do After Removal? - Microsoft Q&A