MATLAB2012b，激活后，启动仍然提示激活无法启动 
始终只能打开，这一个激活界面
解决方法：
方法一：
把windows7系统的日期，往前调几年就行了
方法二：
复制下面文件创建一个 XXX.lic的文件去代替安装目录license文件夹下的文件，即可
%%%%%%%%%%%%%%%%%%%%%%%%%%%% INCREMENT Aerospace_Blockset MLM 99 permanent uncounted A05070F00D1EB1F92326 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=216 SN=888888 TS_OK INCREMENT Aerospace_Toolbox MLM 99 permanent uncounted 6090F0C08395D4289512 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=237 SN=888888 TS_OK INCREMENT Bioinformatics_Toolbox MLM 99 permanent uncounted 40E0B0406DE56D23A426 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=190 SN=888888 TS_OK INCREMENT Cert_Kit_IEC MLM 99 permanent uncounted 9080309041D2DCCB2B10 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=179 SN=888888 TS_OK INCREMENT Communication_Blocks MLM 99 permanent uncounted 80E010304ACCEEB5E0AA VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=77 SN=888888 TS_OK INCREMENT Communication_Toolbox MLM 99 permanent uncounted C0003000770A1A086530 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=162 SN=888888 TS_OK INCREMENT Compiler MLM 99 permanent uncounted 60D0C0F0DC03C2F72FF7 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=232 SN=888888 TS_OK INCREMENT Control_Toolbox MLM 99 permanent uncounted 6020E0B00B7ECE0893BB VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=7 SN=888888 TS_OK INCREMENT Curve_Fitting_Toolbox MLM 99 permanent uncounted 10703080061FF9DA5A81 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=229 SN=888888 TS_OK INCREMENT Data_Acq_Toolbox MLM 99 permanent uncounted E0B0E0E05124CF4A1A8D VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=21 SN=888888 TS_OK INCREMENT Database_Toolbox MLM 99 permanent uncounted 0010D0B02CA7353F8314 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=230 SN=888888 TS_OK INCREMENT Datafeed_Toolbox MLM 99 permanent uncounted 40905060D1ECD939538F VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=185 SN=888888 TS_OK INCREMENT Dial_and_Gauge_Blocks MLM 99 permanent uncounted A0F05070AA9AEBF40588 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=226 SN=888888 TS_OK INCREMENT Distrib_Computing_Toolbox MLM 99 permanent uncounted 5000D00031D2C6B89F9C VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=229 SN=888888 TS_OK INCREMENT EDA_Simulator_Link MLM 99 permanent uncounted E070C0C02B4B90B5A8D0 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=205 SN=888888 TS_OK INCREMENT Econometrics_Toolbox MLM 99 permanent uncounted 505010F00EB1289A73BA VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=149 SN=888888 TS_OK INCREMENT Embedded_IDE_Link MLM 99 permanent uncounted 90E01090A9BDA4FF67D7 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=254 SN=888888 TS_OK INCREMENT Excel_Link MLM 99 permanent uncounted E0800080FED6DF10E43F VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=207 SN=888888 TS_OK INCREMENT Filter_Design_HDL_Coder MLM 99 permanent uncounted 3050B02039903259577E VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=181 SN=888888 TS_OK INCREMENT Filter_Design_Toolbox MLM 99 permanent uncounted 3000E0B02C875CDF5823 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=239 SN=888888 TS_OK INCREMENT Fin_Derivatives_Toolbox MLM 99 permanent uncounted 70A010D017A8FA7CE955 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=247 SN=888888 TS_OK INCREMENT Financial_Toolbox MLM 99 permanent uncounted 20E050A0ACC6A69E7AEE VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=241 SN=888888 TS_OK INCREMENT Fixed-Point_Blocks MLM 99 permanent uncounted E0206040ED6EF9BCCB3B VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=11 SN=888888 TS_OK INCREMENT Fixed_Income_Toolbox MLM 99 permanent uncounted 50E090D0C130F6416176 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=132 SN=888888 TS_OK INCREMENT Fixed_Point_Toolbox MLM 99 permanent uncounted C07000703494010EF55C VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=154 SN=888888 TS_OK INCREMENT Fuzzy_Toolbox MLM 99 permanent uncounted D04010B048FB8D350E4E VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=233 SN=888888 TS_OK INCREMENT GADS_Toolbox MLM 99 permanent uncounted 50D0900087384B51643A VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=210 SN=888888 TS_OK INCREMENT Identification_Toolbox MLM 99 permanent uncounted 00707080A0CC0D8FB71E VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=190 SN=888888 TS_OK INCREMENT Image_Acquisition_Toolbox MLM 99 permanent uncounted 50D0D0905C22130C4D2A VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=208 SN=888888 TS_OK INCREMENT Image_Toolbox MLM 99 permanent uncounted B01030E0F517B496275C VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=133 SN=888888 TS_OK INCREMENT Instr_Control_Toolbox MLM 99 permanent uncounted 80C0505033C162F3017F VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=169 SN=888888 TS_OK INCREMENT MAP_Toolbox MLM 99 permanent uncounted C090E0E022BD3BA852B3 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=4 SN=888888 TS_OK INCREMENT MATLAB_Report_Gen MLM 99 permanent uncounted 80B000B00052F620FB11 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=190 SN=888888 TS_OK INCREMENT MATLAB_Distrib_Comp_Engine MLM 99 permanent uncounted 804080300CB545FBECE8 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=233 SN=888888 TS_OK INCREMENT MATLAB_Builder_for_Java MLM 99 permanent uncounted 404040707C2CA5639DEE VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=186 SN=888888 TS_OK INCREMENT MATLAB_Builder_for_dot_Net MLM 99 permanent uncounted 8070E0D0FFAA645DA39D VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=255 SN=888888 TS_OK INCREMENT MATLAB MLM 99 permanent uncounted 50E0F0D08F6CEF24CC5B VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=14 SN=888888 TS_OK INCREMENT MATLAB_Excel_Builder MLM 99 permanent uncounted 50106010BCBF479623D9 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=206 SN=888888 TS_OK INCREMENT MBC_Toolbox MLM 99 permanent uncounted B05000C02F157C5BEE28 VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=198 SN=888888 TS_OK INCREMENT MPC_Toolbox MLM 99 permanent uncounted 3050206087BF1C33045E VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=203 SN=888888 TS_OK INCREMENT Neural_Network_Toolbox MLM 99 permanent uncounted D0009010451EEB5A283F VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=198 SN=888888 TS_OK