have not seen such issue. have u tried re-install it? What is PT version and what Win 7 bit version (32 or 64)? Try match version, aka install PT 32 bit on Win 32 or 64 on 64. If that does not work and u have Win 7 64bit, try PT 32bit.
My PT 8.2.0 version works fine on Win 7 64bit. Someone has mentioned here recently that the newest PT does not work on Win 7 at all! must have Win 8 and up.
PT help report issue https://app.smartsheet.com/b/form/e8051c092e07401aa7d50ec2424a6e1c
https://www.packettracernetwork.com/
Regards, ML
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