C:\Windows\system32>setx GPU_FORCE_64BIT_PTR 0
SUCCESS: Specified value was saved.
C:\Windows\system32>setx GPU_MAX_HEAP_SIZE 100
SUCCESS: Specified value was saved.
C:\Windows\system32>setx GPU_USE_SYNC_OBJECTS 1
SUCCESS: Specified value was saved.
C:\Windows\system32>setx GPU_MAX_ALLOC_PERCENT 100
SUCCESS: Specified value was saved.
C:\Windows\system32>setx GPU_SINGLE_ALLOC_PERCENT 100
SUCCESS: Specified value was saved.
C:\Windows\system32>REM IMPORTANT: Replace the ETH address with your own ETH wallet address in the -wal option (Rig001 is the name of the rig)
C:\Windows\system32>PhoenixMiner.exe -pool ssl://eu1.ethermine.org:5555 -pool2 ssl://us1.ethermine.org:5555 -wal 0x099b7f4e5E2f5ecEB1cdf56497A5fF429AB1F841.Rig01386
'PhoenixMiner.exe' is not recognized as an internal or external command,
operable program or batch file.
C:\Windows\system32>pause
Press any key to continue . . .What did I do wrong??

Why put your miner in C:\Windows\system32 directory? If its NOT there, then you have to add directory where you put it into PATH variable, or,
better yet, start it from its own directory
Another problem could be that its not where you think it should be because your AV erased it