CLAREMONT,Walling Data Systems, an IT sales and service firm based in Claremont, is the first U.S. distributor for Grisoft Anti-Virus software.

Grisoft is based in the Czech Republic with U.S. operations in New Jersey and California. It focuses on virus detection and PC protection.

The company says its AVG Anti-Virus line incorporates an aggressive, multi-layer preprocessing procedure to screen data against viruses, trojans and worms.