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Knowledge Base

All the USB equipments of the individual computer which installed agent can’t be identified and used

Publication Date:  2019-07-19  |   Views:  705  |   Downloads:  0  |   Author:  SU1000722738  |   Document ID:  EKB1000019543


Issue Description

Received the customer's call, they said there are some individual staffs reflect theUSB mouse and keyboard can’t be used, after exchanged for other people’s USB mouse and keyboard, the situation is still;
To the onsite, find out the problem is as customer mentioned, but PS2 interface equipment is used normal;
But the situation just appeared in some individual terminals, most other terminals were used normally;

Alarm Information


Handling Process

Delete the following registry’s key value of the terminal computer:
If the LowerFilters key value is I1t, delete it.

Root Cause

1, preliminary doubt it is caused by USB control strategies, first of all removed the USB strategies in the TSM server, machine repeatedly to restart a few times, the problem is unsolved;
2, at the same time USB control strategy is aimed at storage equipment, and the mouse and keyboard even with strategy, also should not be limited;
3, contacted with the R&D, give relevant information to the contact, R&D analysis the following key value of the registry is anomaly
Normally it won't have LowerFilters key value or the LowerFilters key value should not be i1t;