Yahoo on Thursday is expected to release an upgrade for its downloadable toolbar to help people detect and remove spyware, or malicious files, on their PCs.

For now, the Web portal will be testing the technology, which has been supplied by antispyware company PestPatrol. It will offer the toolbar upgrade only to a select number of people at beta.toolbar.yahoo.com, Yahoo spokeswoman Stephanie Iwamasa said.

Read more: CNet News.