0001181431-13-036915 3 2 20130626 20130626 20130626 CDW CORP 0000899171 5961 363310735 IL 1231 200 N MILWAUKEE AVE VERNON HILLS IL 60061 8474656000 200 N MILWAUKEE AVE VERNON HILLS IL 60061 CDW COMPUTER CENTERS INC 19930322 ALESIO STEVEN W 0001192733 3 34 000-21796 13935810 C/O GENWORTH FINANCIAL, INC. 6620 WEST BROAD STREET RICHMOND VA 23230 3 1 rrd384378.xml FORM 3 EX-24. 2 rrd345713_390984.htm POWER OF ATTORNEY