KSWS spawns a lot of PR*.tmp files [Kaspersky Security for Windows Server]

[Antipova Anna]

Advice and Solutions (Forum Knowledgebase) Disclaimer. Read before using materials.

Problem

You might notice that large files named like PR*.tmp appear in C:\Windows\Temp.

Cause

This is known and expected behavior. When the product scans an object it creates a temporary copy, names it like PR*.tmp and places it in the temp folder.Once the scan is complete, this temporary file gets deleted.

Large PR*.tmp files mean that some large objects are scanned by OAS (On-Access Scan) or ODS (On-Demand Scan).

Solution

In some cases there might be not enough space of drive to create large temporary file. Below are the possible solutions:

1. Exclude large objects from OAS and ODS;
2. In OAS and ODS settings, enable option 'Do not scan compound objects larger than' and specify required size in MB;
3. Change the folder where KSWS temporary files are created to a drive with higher capacity. In KSWS11 this can be achieved by editing Application settings → Scalability, interface and scan settings → Scan settings → 'Folder for temporary files created during scanning'. In KSWS10 use below registry entry:

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\KasperskyLab\WSEE\10.1\Environment] "ProcessingTempPath"="d:\\Temp\\"